# Function lcm

## Synopsis

```
#include "breeze/mathematics/lcm.hpp"
template <typename T>
constexpr T lcm(T a, T b)
```

## Description

Returns the least common multiple of two integers.

If `T`

is not an integral type the program is ill-formed. If the least common multiple of `|a|`

and `|b|`

is not representable as a value of type `T`

, the behavior is undefined.

- Returns
- If either
`a`

or`b`

is zero, returns zero. Otherwise it returns the least common multiple of`|a|`

and`|b|`

. - Note
- This template diverges from the C++17 specification for the same reason why
`breeze::gcd()`

does. - See
- gcd().

## Mentioned in

- Getting Started / Supported compilers

## Source

Line 42 in breeze/mathematics/lcm.hpp.